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Inicio » Actividades I+D > Publicaciones 2010 > Zoledronate complexes. I. Poly[[μ2-aqua[...
artículo con referato
"Zoledronate complexes. I. Poly[[μ2-aqua[μ3-1-hydroxy-2-(1H,3H-imidazol-3-ium-1-yl)ethylidenediphosphonato]potassium(I)] monohydrate]"
E. Freire, D.R. Vega and R. Baggio
Acta Cryst. C 66(1) (2010) m13-m16
The title compound, {[K(C5H9N2O7P2)(H2O)]·H2O}n, is polymeric and consists of layers parallel to (001) interconnected by hydrogen-bonding and ππ interactions. The K+ cation is eightfold coordinated in a KO8 environment by O atoms from three different chelating zoledronate units and two coordinated water molecules. The zoledronate group presents its usual zwitterionic character, with negative charges in the singly protonated phosphonate groups and a positive charge at the protonated imidazole N atom. The anion binds to three different K+ cations in a (so far unreported) triply chelating manner. Intra- and interplanar interactions are enhanced by a variety of hydrogen bonds involving all available O–H and N–H donors. A strong imidazole-phosphonate C–HO interaction is present in the structure.
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